if china will ban it they will ban the mining activity too, which mean that the diff will decrease dramatically, and miners will have an easy time making profit for a long time
you can't simply replenish 70'% of the network in a short time, the price i think it will not tank so much, because panic buyers will be all over the price when the value will tank
Panic buyers did not manage to keep the price up when the price started tanking to 200 after the last rally.
If there is real blood on the street,
those buyers will rather be panic sellers. Smart money will still buy though.
It is true with stocks but not with Bitcoin
The mentality of Bitcoin users differs substantially from that of stock and fiat currency holders. Bitcoiners are more "religious" in this respect, and we saw just that recently when the price hit a massive buy wall on its way down around 750-800 dollars per coin (above from where the rally had started), so no amount of FUD could crash it. Even the reports of the Chinese central bank assault on major exchanges in China could shake it. And I'm inclined to think that things will mostly remain the same in the future unless really serious events unfold that will heavily undermine such unconditional support